Hi !
Many many thanks for your answers, I am going to try these recovering software
I hope it works

Hello,
I've lost my main .wallet file after saving it in a flash drive. This flash drive it's not detected anymore after it get accidentaly removed very fast from my computer. I had the intention to make more copies but at that moment it was my first and only one, as I had just bought my bitcoins few time before. Is there any possibility of having my bitcoins back? I managed the wallet with multibit. Thanks.

Hello, the guidebook says that "when you open MultiBit, the wallets that were open in the previous use of MultiBit are reopened", but I've stored some money in a wallet that I created in a USB key. Now I am opening again multibit and I can't see this wallet. The .wallet and .info files are in the flash and I know its address so the problem is, how to do in order to see the wallet in multibit again? there is not an explanation of it in this short guidebook. Thanks for your help.